定义 中文名称： 残效 英文名称： residual effect 定义1： 药剂施于靶体后，残余物产生的药效期。 应用学科： 昆虫学（一级学科）；昆虫毒理与药理（二级学科） 定义2： 一种化学药剂施于农作物或土壤中后
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他颇具说服力的指出，通过设立摧残效率的关税壁垒来保护本国产业远逊于直接帮助那些为混乱的变革所困扰的工人。
He argues, persuasively, that it is far better to help workers affected by disruptive change than it is to shield industries with efficiency-destroying tariffs.
树大夫树干注药，残效期长，无污染，对天敌安全，果实无残留，可在生产中推广使用。
Trunk inoculation of Shudaifu was long lasting, pollution free, safe to natural enemies and no pesticide residue in fruits. It could be popularized in the production.
灭幼脲以其独特的杀虫方式，及其广谱、高效、低毒、低成本、残效期长等优点，被誉为“绿色农药”。
DFB is called "green pesticide" with the characters:individual mode of action, broad spectrum, high performance, hypovirulence, low cost, long residual efficient duration.
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